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The average monthly salary of employees, consisting of officers and workers, of an organisation is Rs 3,000. The average salary of an officer is Rs 10,000 while that of a worker is Rs 2,000 per month. If there are total 400 employees in the organisation, find the number of officers
Let number of officers be $$x$$ and number of workers be $$(400-x)$$
According to ques,
=> $$(10,000\times x)+2,000\times(400-x)=3,000\times400$$
=> $$10,000x+8,00,000-2000x=12,00,000$$
=> $$8000x=4,00,000$$
=> $$x=50$$
$$\therefore$$ Number of officers = 50
=> Ans - (B)
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